(1)小明的测量方法是:在天平的左盘中放入几粒米,调节天平,使横梁平衡后进行了测量,天平再次平衡时,砝码和游码的读数如图所示,则鸡蛋的质量
(2)小丽利用“等效替代法”测量了鸡蛋的质量,她的做法是:将鸡蛋放入右盘,左盘放入米粒,调节米粒的多少使天平平衡,再取出盘中的
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2